% 8 nodes diminishing return
\begin{table}[htp]
\setlength{\tabcolsep}{5pt}
\begin{center}
{
\begin{tabular}{|c|c|c|c|}
\hline
\multirow{1}{*}{Domain}	&	\multicolumn{1}{|c|}{LAMA}	&\multicolumn{1}{|c|}{RW-BFS$_{s}$}
&\multicolumn{1}{|c|}{RW-BFS$_{p}$}
\\
%		\cline{2-5}
%		&	\#		& T	& \# & T \\
\hline
elevator & 25 & 30 & 29\\ 
wood & 28 & 30  & 30\\ 
parc & 23 & 23  & 29\\ 
sokoban & 24 & 24   & 25\\ 
open6a & 30 & 30 &  30\\ 
peg & 30 & 30 &   30\\ 
scan & 30 & 30  & 30\\ 
trans & 30 & 30     & 30\\ 
\hline
Total & 220 & 227 & 233\\ 
\hline
\end{tabular}
} % scriptsize
\end{center}
\caption{\small Number of solved instances for three planners on IPC'6 domains (Time limit is 300s).}
\label{tb:statistic}
\end{table}

